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How to trim PTFE tube - Multi Material

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How to trim PTFE tube - Multi Material

How to trim PTFE tube - Multi Material
Last updated 3 months ago
How to trim PTFE tube - Multi Material
 Difficulty
Moderate
 Steps
13
 Available languages
CSPLESDEITFRJA

Step 1 Introduction

Introduction
Introduction
Introduction
Introduction
⬢

This guide is dedicated to the PTFE tubes for Multi Material Original Prusa printers.

PTFE tube specifications are listed below.

All the required tubes come with the current products already cut to size. For replacements, visit the Prusa E-shop. 

However, if you need to make your own PTFE tubing, make sure to read the following guide carefully.

⬢For single material Original Prusa printers PTFE trimming guide, go to: How to trim PTFE tube - Original Prusa printers
⬢For trimming, get a cutting tool with a thin blade. Use either razor or carpet knife. DON'T use a kitchen knife.
⬢For chamfering, we recommend to use a specific drill bit with appropriately angled conical head.
⬢Using the chamfering drill bit, we recommend using it by hand. If you use an electric drill, set it to low speed and press very gently.

Step 4 MMU3 Unit

MMU3 Unit
MMU3 Unit
MMU3 Unit
MMU3 Unit
This an ideal shape of the PTFE tube for Multi Material printer. Given dimensions and angles are recommended values.
⬢MMU3 Unit
⬢MMU3 Unit - Printer’s Extruder
⬢

MMU3 Unit - Buffer

Buffer - Spool holder

Dimensions of the PTFE tube in the MK3S+ hotend are the same as on the single-material version of the printer.

Step 5 OBSOLETE: PTFE for the MK3S/MK2.5S MMU2S (part 1)

OBSOLETE: PTFE for the MK3S/MK2.5S MMU2S (part 1)
OBSOLETE: PTFE for the MK3S/MK2.5S MMU2S (part 1)
OBSOLETE: PTFE for the MK3S/MK2.5S MMU2S (part 1)
OBSOLETE: PTFE for the MK3S/MK2.5S MMU2S (part 1)
This an ideal shape of the PTFE tube for Multi Material printer. Given dimensions and angles are recommended values.
⬢HOTEND PTFE
⬢PTFE HOLDER
⬢EXTRUDER TO MMU2S UNIT
See the next step for the other PTFE tubes for the MMU2S printer.
All dimensions are in millimetres.

Step 7 OBSOLETE: PTFE for the MK3/MK2.5 MMU2 (part 1)

OBSOLETE: PTFE for the MK3/MK2.5 MMU2 (part 1)
OBSOLETE: PTFE for the MK3/MK2.5 MMU2 (part 1)
OBSOLETE: PTFE for the MK3/MK2.5 MMU2 (part 1)
OBSOLETE: PTFE for the MK3/MK2.5 MMU2 (part 1)
This an ideal shape of the PTFE tube for Multi Material printer. Given dimensions and angles are recommended values.
⬢HOTEND PTFE
⬢PTFE HOLDER
⬢SPOOL HOLDER
See the next step for the last PTFE tube for the MMU2 printer.
All dimensions are in millimetres.

Step 9 OBSOLETE: PTFE for the MK2/S MMU1

OBSOLETE: PTFE for the MK2/S MMU1
OBSOLETE: PTFE for the MK2/S MMU1
OBSOLETE: PTFE for the MK2/S MMU1
This an ideal shape of the PTFE tube for Multi Material printer. Given dimensions and angles are recommended values.
⬢HOTEND PTFE
⬢EXTRUDER TO MULTIPLEXER
All dimensions are in millimetres.

Step 10 MMU1: Where to trim the tube (important)

MMU1: Where to trim the tube (important)
MMU1: Where to trim the tube (important)
IT IS CRUCIAL to cut the correct end of the tube, check twice before you start!
⬢One end of the tube has "rounded" outer edge. DON'T CUT this part.
⬢Look at the other end, where the tube is drilled inside, shape of the edge is "conical". This is the side you CAN CUT.

Step 11 MMU1 Y-splitter PTFE: proper tools

MMU1 Y-splitter PTFE: proper tools
MMU1 Y-splitter PTFE: proper tools
MMU1 Y-splitter PTFE: proper tools
MMU1 Y-splitter PTFE: proper tools
⬢During the MMU1 assembly, it might happen your PTFE tube is too long to fit in the Y-splitter.
ATTENTION!!! Please read all instructions at least twice! If you trim or drill the tube improperly, you will have to order it again!
READ CAREFULLY instructions for the tools before you proceed further. Prusa Research is not responsible for any harm or injury.
⬢For trimming get a cutting tool with a thin blade. Use either razor or carpet knife. DON'T use kitchen knife.
⬢For drilling is recommended to use a drill bit with conic head or you can use a drill bit with diameter 3,5 - 4 mm. The point is to make a conical entrance in the tube.

Step 12 MMU1: Trimming the PTFE tube

MMU1: Trimming the PTFE tube
MMU1: Trimming the PTFE tube
MMU1: Trimming the PTFE tube
⬢Take the razor or knife and carefully trim the tube.
Don't press too hard during the cutting on the tube, you can deform the circular shape and this will lead to filament jam!
⬢Optimal length is 41 mm for MMU1 Y-Splitter.

Step 13 MMU1: Drilling the tube's edge

MMU1: Drilling the tube's edge
MMU1: Drilling the tube's edge
MMU1: Drilling the tube's edge
⬢After cutting the tube to appropriate length, you need to renew the conical entrance.
⬢Use the drill bit you've prepared in the beginning. You can use electric drill, but set it to low RPM and press very gently.
⬢It is important to achieve smooth entrance, so the filament will slide in. Clean the tube from any particles, which might prevent it.
⬢That's it! Place the PTFE tube back to the Multiplexer and continue with the assembly.
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